Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
Stockpile - Stockpile is a free online inventory system for small business and at home uses.
Chef - Automation for all of your technology. Overcome the complexity and rapidly ship your infrastructure and apps anywhere with automation.
Snipe-IT - Managing assets with a Google doc or a shared Excel spreadsheet is more common than you think.
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.
inFlow Inventory - inFlow Inventory is inventory management software for small businesses.